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| 当前,柴油机动车因具有良好的动力性和经济性,更有着节能环保的优势在世界各国得到广泛的使用,是其尾气中排放出的主要污染物碳烟(PM)、氮氧化物(NOx)、一氧化碳(CO)、碳氢化合物(CH)对城市环境造成极大污染,同时严重危害到人体的健康。排气后处理技术中颗粒物过滤器(DPF)作为柴油车排气碳烟消除最有效且实用的方法在柴油车排气处理装置中广为使用,但需在DPF内壁上涂覆贵金属型催化剂,而贵金属资源日益短缺,且价格昂贵。钙钛矿结构的LaMnO3由于A位部分被取代而具有更高的催化活性,已经成为目前柴油车催化剂研究的热点。 |
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wyky2007136
金虫 (小有名气)
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【答案】应助回帖
wangzhicheng(金币+40, 翻译EPI+1): ★★★★★最佳答案 很快很强大,MM我爱你 2012-02-14 16:48:43
| At present, the diesel motor vehicle not only has good power and economy, but also has the advantages of energy saving and environmental protection, thus have been widely used in countries around the world. However, major pollutants discharged in exhaust gas of the diesel motor vehicle, such as particle matter (PM), nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (CH), have great pollution on the urban environment and generate serious harm to human health at the same time. In exhaust gas post-treatment technology, diesel particulate filter (DPF) serving as a most effective and practical method for eliminating PM in the exhaust gas of the diesel vehicle is widely used in a diesel vehicle exhaust gas treatment device, but a noble metal catalyst is required to be coated on the inner wall of the DPF, and the noble metal resources are becoming scarce and expensive. LaMnO3 with perovskite structure has higher catalytic activity because the A position part is replaced, thus has become a research hot topic of the diesel vehicle catalyst. |

2楼2012-02-14 14:42:08













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